Mercurial > hg > octave-lojdl > gnulib-hg
changeset 4875:2f724c1e6ebe
Mention that S+T cannot overflow if S is the size of an existing
object and T is sufficiently small.
| author | Paul Eggert <eggert@cs.ucla.edu> |
|---|---|
| date | Mon, 17 Nov 2003 21:47:16 +0000 |
| parents | 310bf22ff300 |
| children | c515580049a9 |
| files | README |
| diffstat | 1 files changed, 5 insertions(+), 0 deletions(-) [+] |
line wrap: on
line diff
--- a/README +++ b/README @@ -130,6 +130,11 @@ for all practical hosts with flat address spaces, but it is not always true for hosts with segmented address spaces. + * If an existing object has size S, and if T is sufficiently small + (e.g., 8 KiB), then S + T cannot overflow. Overflow in this case + would mean that the rest of your program fits into T bytes, which + can't happen in realistic flat-address-space hosts. + * Objects with all bits zero are treated as 0 or NULL. For example, memset (A, 0, sizeof A) initializes an array A of pointers to NULL.